Stove-pipe drum



(No Model.)

M. J. LIDDELL.

STOVE PIPE DRUM.

N0. 391,541. Patented 0013. 23, 1888.

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WITNESSES: INVENTOR: M BY fl g 44% ATTORNEYS.

UNITED STATES PATENT MARK J. LIDDELL, OF SOUTH ENGLEWOOD, ILLINOIS.

STOVE-=PIPE DRUM.

SPECIFICATION forming part of Letters Patent No.391,51-1,dated October 23, 1888.

Application filed December 5, 1887. Serial No. 257,041. No model.)

To all whom it may concern:

Be it known that I, MARK J. LIDDELL, of South Englewood, in the county of Cook and State of Illinois, have invented a new and Improved Stove'Pipe Drum, of which the following is a full, clear, and exact description.

My invention relates to a drum for receiving and radiating heat from products of combustion passing through a draft-pipe leading from a stove or heater, with a view to economy of fuel consumed in heating one or more apartments; and the invention has for its object to provide a simple, inexpensive, and efficient device of this character.

The invention consists in certain novel features of construction and combinations of parts of the stove-pipe drum, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a central vertical section of my improved stove pipe drum and parts of connected joints of pipe. Fig. 2 is a plan view of the drum in horizontal section on the line 00 00, Fig. 1.

The outer wall or cylinder, A, of the stovepipe drum is made in two parts or sectionsan upper part, A, and a lower part, A which are fitted together, preferably near the lower end of the cylinder, which is inclined or tapers to a short pipe or neck, a, to which a joint, B, of stove-pipe is adapted, while the tapering upper end of the cylinder has fitted to it an inner direct-draft flue or pipe, 0, to the projecting end a of which the upper joint, D, of stove-pipe is fitted. The inner pipe, 0, extends forquite a distance through the drum, and is directly in line with a shorter pipe, E, which is fitted into the bottom f of the intermediate wall or cylinder, F, of the drum and in line with the neck a of the outer cylinder. The pipes G E and the neck care separated to give passage to heated products of combustion, in a manner presently explained. A

lower damper, E, fitted in the pipe E, is pro vided with a stem, 6, which extends through the side of the drum to allow operation of the damper.

I show the inner cylinder, F, made in two parts; but it may be made in one piece, if

preferred. This cylinder or cylindrical cup F f is supported within the main outer cylinder, A, and above its bottom or lower end, by feet or brackets G, fixed to it and to the end of the main cylinder or wall of the stove-drum, and in a manner to provide a space or passage, H, between the margin of the bottom f of the cylinder E, and hold the sides of the cylinder about midway between the outer wall, A, and inner pipe, C, of the drum, thereby providing a passage or fine, I. between the cylinders A F and a passage or flue, J, between the cylinder F and the inner pipes, O E.

On the pipe 0 there is fitted a short pipe or collar, K, to which is connected one end of a rod, L, the lower end of which is preferably forked at Z to embrace the collar K, and the upper part of the rod L passes upward through the end of the outer cylinder, A, into position to allow it to be grasped for conveniently sliding the collar K on the pipe 0, so as to open the space at 6 between the adjacent ends of the pipes O E, as shown in full lines in Fig. 1 of the drawings, or to close said space c, as indicated by the dotted lines.

In the upper-end or neck, 0, of the pipe O is fitted a damper consisting of two semicircular plates, M M, each of which is pivoted at its inner edge by a pin, m, to the pipe.

The operation ofthe stove-drumis as follows: When the collar or damperK is raised on the pipe 0 to open the space 6 between the pipes G E and the lower damper, E, is closed, as shown in full lines in the drawings, all the products of combustion passing from a stove or heater to which the pipe B is connected will enter the drum-neck a, and will pass outward 1 through the passage H and upward into the flue I, and thence downward through the flue J and through the opening 6 into the pipe 0, and thence upward past the open damper M M into the pipe D, and thence to the draft-flue, to which this pipe is connected. Vith this adjustment of the dampers in cold weather a lively circulation of the hot products of combustion will be allowed and maintained in direct contact with the wall of the outer cylinder, A, and within the inner cylinder, F, and a large amount of heat which would otherwise escape to the draft-flue is retained, and then given off or radiated by the main cylinder A to the room, and fuel is economized.

It is obvious when the collar-damper K is lowered to close the opening 6 between the pipes O E, and as indicated by the dotted lines in Eig.1of the drawings, and when the damper E is open, that the heated products from the stove cannot have free circulation through the passage H and flues I J, and a practically direct draft of the products of combustion from the stove or heater will be maintained through the drum-neck a and the pipes E G D to the draft-flue. The outer wall or cylinder, A, will then give off very little heat to the room in which the stove or its draft-pipe is placed, as required in warm or moderately-cool weather, and while the heat is thus practically cut off from the outer main heat-radiating cylinder, A, a direct draft is allowed through the drum to the chimney-flue. i By making the main cylinder A of the drum in separable parts the whole interior of the drum is made easily accessible for cleaning or repairs.

lt is obvious that the two pipes 0 E may be made as one pipe provided with one or more slots or openings at e, which may be closed by the sliding damper K on the pipe; but the two pipes give a larger opening at 0, and are therefore preferred in practice.

IIaving thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

l. A stove-drum made with an outer cylinder, an intermediate cylinder, and an inner draft-pipe,providing draft-fines I J, said draftpipe provided at or near its lower end with an opening, e, and a damper on the draft-pipe controlling said opening, substantially as herein set forth.

2. A stove-drum made with an interior draft-fine comprising pipes O E, separated from each other at adjacent ends, and a collar or damper, K, fitted to the pipes and adapted to close the opening 6 between them, substantially as described, for the purposes set forth.

3. The combination, in a stove-drum, of an outer cylinder, an intermediate cylinder, and an inner draft-pipe provided at or near its lower end with an opening, 6, a damper fitted on the draft-pipe to control said opening, and a damper fitted in the draft-pipe below said opening, substantially as described, for the purposes set forth.

4. The combination, in a stove-drum, of an outer cylinder, A, an intermediate cylinder, F, having a bottom, f, and supported by h 

